Design of a Vivaldi antenna with wideband reduced radar cross section

Khan, Tayyab; Li, Jianxing; Li, Zhiyuan; Abdullah, Muhammad; Chen, Juan; Zhang, Anxue

doi:10.1016/j.aeue.2018.08.011

Cited by 25 publications

(9 citation statements)

References 15 publications

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“…The scattering field based on array theory used for the designing of the coding metasurface ground can be written as follows. [ 15 ]

F (θ, ϑ) = \sum_{M, N} A_{M \times N} e^{j ϑ} . e^{j ϑ_{M, N} π}

\begin{matrix} ϑ_{θ, ϑ} = \frac{2 π}{λ} x_{M} (\sin θ \cos ϑ - \sin θ_{inc} \cos ϑ_{inc}) \\ + \frac{2 π}{λ} y_{M} (\sin θ \cos ϑ - \sin θ_{inc} \sin ϑ_{inc}) \end{matrix}

θ_{inc}

and

ϑ_{inc}

are elevation and azimuth angles. The maximum current of the scattering field is an objective function to eliminate scattering energy being scattered mostly in one direction.…”

Section: Mathematical Analysis Of Coding Metasurface Groundmentioning

confidence: 99%

A Compact and High‐Gain Omnidirectional Antenna‐Based Coding Metasurface Ground for Unmanned Aerial Vehicles Applications

Saleem

Anjum

Atiq

2022

Physica Status Solidi (a)

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As the development of vastly incorporated systems for both electronic warfare (EW) and communication-oriented uses advances, compact, lightweight, and wideband, antennas appear to become increasingly important for unmanned aerial vehicle (UAV) platforms. An empirical evaluation of a small printed passive wideband dipole antenna is presented in this article. The main advantages of this design are that it reduces the antenna's height and weight while keeping the architecture as sturdy as possible from an environmental aspect, with the only drawback being a reduction in voltage standing wave ratio (VSWR) efficiency. UAVs are increasingly being used for commercial, agriculture, and military purposes. For communication and navigation, UAVs require small, lightweight antennas. Omnidirectional antennas are extensively used in UAV systems. A UAV's mission is to collect and send accurate data in real time to base stations. As little more than a result, maintaining a stable Wi-Fi connection is essential. Horizontally polarized (HP) antennas might be able to provide polarization variety for secure wireless communication and navigation. HP omnidirectional antennas have been developed in large numbers. Both of these HP antennas, however, do not function in multiband mode. Only two publications on dual-band HP omnidirectional antennas have been found in periodicals to our knowledge. The feed network for two vertically stacked omnidirectional components in a wideband omnidirectional antenna array is explained. [1] The antenna has an 18% impedance and emits monopole-like radiation characteristics. Circular patch antennas and circularly periodic mushroom units make up the antennas. [2] Unfortunately, the majority of monopole antennas have such a high profile and a low-elevation angle radiation pattern, making them unsuitable for large metallic vehicle communication. UAVs have gotten a lot of press for military, industrial, and scientific uses. [3] An antenna for UAV applications should get a low profile to reduce air resistance, as well as small size, and also be lightweight. [4] An antenna for UAV applications should get a low profile to reduce air resistance, as well as small size, and just be lightweight. [5] As a low-profile antenna with an omnidirectional radiation pattern, a segmented loop antenna was investigated. [6] Although capacitive interaction between several segments causes an in-phase current, a segmented loop antenna has an omnidirectional radiation pattern. The antenna size and

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“…The scattering field based on array theory used for the designing of the coding metasurface ground can be written as follows. [ 15 ]

F (θ, ϑ) = \sum_{M, N} A_{M \times N} e^{j ϑ} . e^{j ϑ_{M, N} π}

\begin{matrix} ϑ_{θ, ϑ} = \frac{2 π}{λ} x_{M} (\sin θ \cos ϑ - \sin θ_{inc} \cos ϑ_{inc}) \\ + \frac{2 π}{λ} y_{M} (\sin θ \cos ϑ - \sin θ_{inc} \sin ϑ_{inc}) \end{matrix}

θ_{inc}

and

ϑ_{inc}

are elevation and azimuth angles. The maximum current of the scattering field is an objective function to eliminate scattering energy being scattered mostly in one direction.…”

Section: Mathematical Analysis Of Coding Metasurface Groundmentioning

confidence: 99%

A Compact and High‐Gain Omnidirectional Antenna‐Based Coding Metasurface Ground for Unmanned Aerial Vehicles Applications

Saleem

Anjum

Atiq

2022

Physica Status Solidi (a)

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“…The unidentical coding artificial magnetic conductor ground is structured to reduce the backscattering energy level of the antenna array, such as a chessboard‐like configuration, and a coaxial feed is given separately to each array. [ 12–16 ]…”

Section: Introductionmentioning

confidence: 99%

Coding Artificial Magnetic Conductor Ground and Their Application to High‐Gain, Wideband Radar Cross‐Section Reduction of a 2×2 Antenna Array

Saleem

Saifullah

2021

Physica Status Solidi (a)

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A new technique is proposed for designing a low‐scattering 2 × 2 antenna array using strategic coding metasurface ground for wideband bistatic and monostatic backscattered energy level reduction. Two various artificial magnetic conductor (AMC) units cells are organized like a chessboard to obtain an effective 180° ± 37° reflection phase difference over a broadband frequency range. The low‐backscattering microstrip antenna array is achieved based on the destructive interference theory and diffusion property of AMC unit cells. Simulations show that the proposed antenna array has a considerable backscattering field level reduction of 4.7–18 GHz for both the x‐ and y‐polarization incident waves. It should also be noted that the maximum reduction of backscattered energy at a frequency of 7.2 GHz is −18 dB. The bistatic backscattering performance of the antenna is also given at different frequencies. Both a reference and a proposed prototype are fabricated, and the results are analyzed. Measurements of the fabricated prototype coincide well with simulations.

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“…By using the reshaping technique, the surface of the target can be modified to redirect the incoming electromagnetic energy (EM) away from the source. The primary drawback of reshaping the surface is that it may alter the other performance parameters of the surface [5]. Furthermore, all these practical techniques reduce the RCS of the targets in a narrow bandwidth.…”

Section: Introductionmentioning

confidence: 99%

Design of a Low Scattering Metasurface for Stealth Applications

Khan

Chen

et al. 2019

Materials

Self Cite

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The design of a metasurface with low radar cross section (RCS) property is presented in this paper. The low scattering of the metasurface is achieved by applying the artificial magnetic conductor (AMC) unit cells in three different configurations. Two different AMC unit cells with an effective phase difference of 180 ± 37° are first designed to analyze the out of phase reflection in a wideband frequency range from 5.9 to 12.2 GHz. Then, the unit cells are placed in a chessboard-like configuration, newly constructed rotated rectangular-shaped configuration, and optimized configuration to study and compare the RCS reduction performance. All designs of the metasurface with different configurations show obvious RCS reduction as compared with the metallic plate of the same size. However, the relative bandwidth of the optimized metasurface is larger than the chessboard-like configuration and rotated rectangular-shaped configuration. To certify the results of the simulations, the metasurface with the optimized configuration is fabricated further to measure the RCS reduction bandwidth. The measured results are in good accordance with the simulated results. Therefore, the proposed metasurface can be a good option for applications where low RCS is desirable.

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Design of a Vivaldi antenna with wideband reduced radar cross section

Cited by 25 publications

References 15 publications

A Compact and High‐Gain Omnidirectional Antenna‐Based Coding Metasurface Ground for Unmanned Aerial Vehicles Applications

A Compact and High‐Gain Omnidirectional Antenna‐Based Coding Metasurface Ground for Unmanned Aerial Vehicles Applications

Coding Artificial Magnetic Conductor Ground and Their Application to High‐Gain, Wideband Radar Cross‐Section Reduction of a 2×2 Antenna Array

Design of a Low Scattering Metasurface for Stealth Applications

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